Problema agregar configuracion del sistema para Moodle

Estimados, estamos teniendo problemas para agrega dentro de la operación Administrar Configuración del Sistema la conexión con Moodle. La versión de Guaraní es la 3.19.1 y la versión de Moodle es 3.9.13. Todo esta bien, pero el mensaje que entrega guaraní es: “No se logró conectar con la Plataforma de Educación Virtual”. Se hace la siguiente prueba:

https://elhardin.com.ar/aula2/webservice/rest/server.php?wstoken=[TOKEN]&moodlewsrestformat=json&wsfunction=core_webservice_get_site_info

y el resultado que se devuelve es correcto.

{"sitename":"HARDINEROS_TESTING","username":"admin_siu","firstname":"Administrador","lastname":"Usuario","fullname":"Administrador Usuario","lang":"es","userid":16,"siteurl":"https:\/\/elhardin.com.ar\/aula2","userpictureurl":"https:\/\/elhardin.com.ar\/aula2\/theme\/image.php\/boost\/core\/1653269524\/u\/f1","functions":[{"name":"core_course_create_courses","version":"2020061513.03"},{"name":"core_course_get_courses","version":"2020061513.03"},{"name":"core_user_get_users","version":"2020061513.03"},{"name":"core_webservice_get_site_info","version":"2020061513.03"},{"name":"enrol_manual_enrol_users","version":"2020061500"},{"name":"core_course_get_categories","version":"2020061513.03"},{"name":"core_course_get_courses_by_field","version":"2020061513.03"},{"name":"core_enrol_get_enrolled_users","version":"2020061513.03"},{"name":"core_enrol_get_users_courses","version":"2020061513.03"},{"name":"core_user_create_users","version":"2020061513.03"},{"name":"core_user_update_users","version":"2020061513.03"},{"name":"enrol_manual_unenrol_users","version":"2020061500"},{"name":"core_course_import_course","version":"2020061513.03"},{"name":"local_user_get_roles","version":"2019011701"},{"name":"auth_userkey_request_login_url","version":"2020050801"},{"name":"core_user_get_users_by_field","version":"2020061513.03"}],"downloadfiles":1,"uploadfiles":1,"release":"3.9.13+ (Build: 20220401)","version":"2020061513.03","mobilecssurl":"","advancedfeatures":[{"name":"usecomments","value":1},{"name":"usetags","value":1},{"name":"enablenotes","value":1},{"name":"messaging","value":1},{"name":"enableblogs","value":1},{"name":"enablecompletion","value":1},{"name":"enablebadges","value":1},{"name":"messagingallusers","value":0},{"name":"mnet_dispatcher_mode","value":0}],"usercanmanageownfiles":true,"userquota":104857600,"usermaxuploadfilesize":1073741824,"userhomepage":1,"userprivateaccesskey":"CLAVE","siteid":1,"sitecalendartype":"gregorian","usercalendartype":"gregorian","userissiteadmin":false,"theme":"boost"}

Aun así no funciona la conexión. No sabemos que mas probar, no sabemos si el problema es desde guaraní o desde Moodle. Los encargados de Moodle ya hicieron dos verificaciones con la documentación en mano.

Saludos cordiales!